(11aS)-8-(benzyloxy)-7-methoxy-1,2,3,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one

(11aS)-8-hydroxy-7-methoxy-1,2,3,10,11,11a-hexahydro-5H-pyrrolo<2,1-c><1,4>benzodiazepine-5-one

(2S)-N-(2-amino-4-hydroxy-5-methoxybenzoyl)pyrrolidine-2-carboxaldehyde diethyl thioacetal

(S)-1-(2-azido-4-hydroxy-5-methoxybenzoyl)pyrrolidine-2-carbaldehyde

methyl-(2S)-N-[4-hydroxy-5-methoxy-2-nitrobenzoyl]pyrrolidine-2-carboxylate